procps/proc/alloc.c

// Copyright (C) 1992-1998 by Michael K. Johnson, johnsonm@redhat.com
// Copyright 2002 Albert Cahalan
//
// This file is placed under the conditions of the GNU Library
// General Public License, version 2, or any later version.
// See file COPYING for information on distribution conditions.

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "alloc.h"


static void xdefault_error(const char *restrict fmts, ...) __attribute__((format(printf,1,2)));
static void xdefault_error(const char *restrict fmts, ...) {
    va_list va;

    va_start(va, fmts);
    fprintf(stderr, fmts, va);
    va_end(va);
}

message_fn xalloc_err_handler = xdefault_error;


void *xcalloc(unsigned int size) {
    void * p;

    if (size == 0)
        ++size;
    p = calloc(1, size);
    if (!p) {
        xalloc_err_handler("%s failed to allocate %u bytes of memory", __func__, size);
        exit(EXIT_FAILURE);
    }
    return p;
}

void *xmalloc(unsigned int size) {
    void *p;

    if (size == 0)
        ++size;
    p = malloc(size);
    if (!p) {
        xalloc_err_handler("%s failed to allocate %u bytes of memory", __func__, size);
        exit(EXIT_FAILURE);
    }
    return(p);
}

void *xrealloc(void *oldp, unsigned int size) {
    void *p;

    if (size == 0)
        ++size;
    p = realloc(oldp, size);
    if (!p) {
        xalloc_err_handler("%s failed to allocate %u bytes of memory", __func__, size);
        exit(EXIT_FAILURE);
    }
    return(p);
}

char *xstrdup(const char *str) {
    char *p = NULL;

    if (str) {
        unsigned int size = strlen(str) + 1;
        p = malloc(size);
        if (!p) {
            xalloc_err_handler("%s failed to allocate %u bytes of memory", __func__, size);
            exit(EXIT_FAILURE);
        }
        strcpy(p, str);
    }
    return(p);
}